We present a general integral identity involving 2α-local fractional derivative. Based on the integral identity and the fact that the 2α-local fractional derivative in absolute value is generalized (s, P)-convex, we establish certain integral inequalities that cover each case of the generalized Hermite-Hadamard's and Bullen type for the class of mappings. Certain applications in α-type special means, probability distribution mappings, the trapezoidal and midpoint formulas, and wave equations on Cantor sets are presented to demonstrate the validity of the obtained results as well.